<template>
  <div>
    <div class="user-info-head" @click="editCropper()">
      <img v-bind:src="options.img" title="点击上传头像" class="img-circle img-lg" />
    </div>
    <el-dialog
      :title="title"
      v-model="open"
      width="800px"
      append-to-body
      @opened="modalOpened"
      @close="closeDialog"
    >
      <el-row>
        <el-col :xs="24" :md="12" :style="{ height: '350px' }">
          <vue-cropper
            ref="cropperRef"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            :outputType="options.outputType"
            @realTime="realTime"
            v-if="visible"
          />
        </el-col>
        <el-col :xs="24" :md="12" :style="{ height: '350px' }">
          <div class="avatar-upload-preview">
            <img :src="previews.url" :style="previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2" :sm="3" :xs="3">
          <el-upload
            action="#"
            :http-request="requestUpload"
            :show-file-list="false"
            :before-upload="beforeUpload"
          >
            <el-button size="small">
              选择
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{ span: 1, offset: 2 }" :sm="2" :xs="2">
          <el-button icon="Plus" size="small" @click="changeScale(1)"></el-button>
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
          <el-button icon="Minus" size="small" @click="changeScale(-1)"></el-button>
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
          <el-button icon="RefreshLeft" size="small" @click="rotateLeft()"></el-button>
        </el-col>
        <el-col :lg="{ span: 1, offset: 1 }" :sm="2" :xs="2">
          <el-button icon="RefreshRight" size="small" @click="rotateRight()"></el-button>
        </el-col>
        <el-col :lg="{ span: 2, offset: 6 }" :sm="2" :xs="2">
          <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script setup lang="ts">
import { ref, reactive } from 'vue'
import { VueCropper } from 'vue-cropper'
import { uploadAvatar } from '@/api/system/user'
import { debounce } from 'lodash-es'
import { ElMessage } from 'element-plus'
import { useStore } from 'vuex'

// 定义组件
defineOptions({
  name: 'UserAvatar',
})

const store = useStore()
const cropperRef = ref()
const open = ref(false)
const visible = ref(false)
const title = ref('修改头像')
const previews = ref({} as any)
const resizeHandler = ref()

const options = reactive({
  img: store.state.user.avatar, //裁剪图片的地址
  autoCrop: true, // 是否默认生成截图框
  autoCropWidth: 200, // 默认生成截图框宽度
  autoCropHeight: 200, // 默认生成截图框高度
  fixedBox: true, // 固定截图框大小 不允许改变
  outputType: 'png', // 默认生成截图为PNG格式
  filename: 'avatar', // 文件名称
})

// 编辑头像
const editCropper = () => {
  open.value = true
}

// 打开弹出层结束时的回调
const modalOpened = () => {
  visible.value = true
  if (!resizeHandler.value) {
    resizeHandler.value = debounce(() => {
      refresh()
    }, 100)
  }
  window.addEventListener('resize', resizeHandler.value)
}

// 刷新组件
const refresh = () => {
  cropperRef.value?.refresh()
}

// 覆盖默认的上传行为
const requestUpload = async () => {}

// 向左旋转
const rotateLeft = () => {
  cropperRef.value?.rotateLeft()
}

// 向右旋转
const rotateRight = () => {
  cropperRef.value?.rotateRight()
}

// 图片缩放
const changeScale = (num: number) => {
  num = num || 1
  cropperRef.value?.changeScale(num)
}

// 上传预处理
const beforeUpload = (file: File) => {
  if (file.type.indexOf('image/') == -1) {
    ElMessage.error('文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。')
  } else {
    const reader = new FileReader()
    reader.readAsDataURL(file)
    reader.onload = () => {
      options.img = reader.result as string
      options.filename = file.name
    }
  }
}

// 上传图片
const uploadImg = () => {
  cropperRef.value?.getCropBlob((data: Blob) => {
    const formData = new FormData()
    formData.append('avatarfile', data, options.filename)
    uploadAvatar(formData).then((response: any) => {
      open.value = false
      options.img = response.imgUrl
      store.commit('SET_AVATAR', options.img)
      ElMessage.success('修改成功')
      visible.value = false
    })
  })
}

// 实时预览
const realTime = (data: any) => {
  previews.value = data
}

// 关闭窗口
const closeDialog = () => {
  options.img = store.getters.avatar
  visible.value = false
  window.removeEventListener('resize', resizeHandler.value)
}
</script>
<style scoped lang="scss">
.user-info-head {
  position: relative;
  display: inline-block;
  height: 120px;
}

.user-info-head:hover:after {
  content: '+';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  color: #eee;
  background: rgba(0, 0, 0, 0.5);
  font-size: 24px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: pointer;
  line-height: 110px;
  border-radius: 50%;
}
</style>
